BMW DTC P0144 – O2 Sensor Circuit High Voltage (Bank 1 Sensor 3)
DTC P0144 meaning on BMW
The Diagnostic Trouble Code (DTC) P0144 for BMW indicates an issue with the O2 sensor circuit high voltage for Bank 1 Sensor 3. This means that the oxygen sensor located after the catalytic converter on bank 1 (cylinder bank containing cylinder 1) and sensor 3 (third sensor in the exhaust system) is reporting a voltage that is higher than the specified range.
BMW DTC P0144 symptoms
Symptoms of DTC P0144 on a BMW may include:
- Check Engine Light (CEL) illuminated on the dashboard
- Decreased fuel efficiency
- Engine running rough or misfiring
- Increased emissions
BMW DTC P0144 causes
The common causes of DTC P0144 on a BMW include:
- Faulty O2 sensor
- Wiring or connector issues in the O2 sensor circuit
- Exhaust leaks near the O2 sensor
- Issues with the catalytic converter
BMW DTC P0144 seriousness
While DTC P0144 may not cause immediate drivability issues, it can lead to decreased fuel efficiency and increased emissions. Ignoring this code can potentially cause damage to the catalytic converter and other components of the vehicle’s emissions system.
How to diagnose DTC P0144 on BMW
To diagnose DTC P0144 on a BMW, you can follow these steps:
- Use an OBD-II scanner to retrieve the specific fault code
- Inspect the wiring and connectors of the O2 sensor for any damage or corrosion
- Check for exhaust leaks near the O2 sensor
- Test the O2 sensor using a multimeter to verify its functionality
How to fix DTC P0144 on BMW
To fix DTC P0144 on a BMW, you can try the following solutions:
- Replace the faulty O2 sensor with a new one
- Repair any damaged wiring or connectors in the O2 sensor circuit
- Fix any exhaust leaks near the O2 sensor
- If necessary, replace the catalytic converter
How to erase DTC P0144 on BMW
To erase DTC P0144 on a BMW after fixing the underlying issue, you can use an OBD-II scanner to clear the fault code. Simply connect the scanner to the vehicle’s OBD port, navigate to the ¨Clear Codes¨ or ¨Erase Codes¨ function, and follow the on-screen instructions to reset the code.
Recommended tools & DTC Scanners for BMW
Best Diagnostic App for modern BMWs: BimmerLink
Recommended Bluetooth adapter for Bimmerlink: OBDLink CX
Cable adapter for Bimmerlink: Enet Cable USB Type C
For older BMWs we recommend: Autel AutoLink AL319 (2024 version)
Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter
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